[Closed] problems with Elixir R brakes

hopefully some one can shed some light, i've had these brakes since last november used them loads. the pistons sometimes don't retract all of the way which causes running from the pads so i then push them back in and then after putting everything back together the brakes just don't work... there is no signs of leakage and i have bleed the rear 2 months ago, and now after an extremely wet ride yesterday they both don't work.. I can see the pistons moving put they just won't touch the disc.. HELP ME PLEASE!